/Engine/Plugins/Online/OnlineSubsystem/Source/Public/Interfaces/OnlineGameActivityInterface.h
Resume an activity. Different from StartActivity in that resume continues from current progress where StartActivity will set progress back to 0 before activating the activity
void ResumeActivity ( const [FUniqueNetId](API\Runtime\CoreOnline\Online\FUniqueNetId) & LocalUserId, const [FString](API\Runtime\Core\Containers\FString) & ActivityId, const [TOptional](API\Runtime\Core\IO\TOptional)< [FOnlineActivityTasksToReset](API\Plugins\OnlineSubsystem\Interfaces\FOnlineActivityTasksToReset) > & TasksToReset, const [FOnResumeActivityComplete](API\Plugins\OnlineSubsystem\Interfaces\FOnResumeActivityComplete) & CompletionDelegate )